if you know any answer to this pls help out I'll give brainiest plus a lot of points​

Answer:

Both resulted in gas formation. Both resulted in color change.

Explanation:

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Answer:

statement second and third are both corect

Explanation:

When iron(grey) reacts with sulfur(yellow) chemical change takes place in which iron sulfide is formed which black in color.

Fe(s) + S(s)\rightarrow FeS(s)Fe(s)+S(s)→ FeS(s)

When we heat copper sulfate-pentahydrate(blue) ,water molecule present in its crystal will get evaporated and it will become an anhydrous copper sulfate which will be white in color.

CuSO_{4}.5H_{2}O(s)\overset{heat}{\rightarrow} CuSO_{4}(s)+5H_2O(g)CuSO

4

.5H

2

O(s)

→

heat

CuSO

4

(s)+5H

2

O(g)

So, in both the reactions chang

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Answer:

The answer is D. net income= (net sales) - (cost of goods sold)- (operating expenses).

Explanation:

Answer:

A

Explanation:

Atomics number = number of protons

As combustion always result into the formation of water, the other type of reactions that may result into formation of water are Acid-Base Neutralization Reactions and Hydrogen and Oxygen Reaction.

Acid-Base Neutralization Reactions:

A neutralisation reaction is a chemical process in which an acid and a base combine to produce salt and water as the end products.

H⁺ ions and OH⁻ ions combine to generate water during a neutralisation reaction. Acid-base neutralisation is the most common type of neutralisation reaction.

Example: Formation of Sodium Chloride (Common Salt):

HCl + NaOH → NaCl + H₂O

Hydrogen and Oxygen Reaction:

Water vapour is created when hydrogen gas (H₂) and oxygen gas (O₂) are combined directly. This reaction produces a lot of heat and releases a lot of energy.

Example: 2 H₂ + O₂ → 2 H₂O

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In first reaction alkyne treated with base to remove proton later alkyne anion react with T20 to form tritium isotope labelled product.

In 2nd and 3rd reaction alcohol treated with D20 to form deuterium containing product.

What are reagents?

Reagents are chemical ingredients (compounds or mixtures, often made of tiny inorganic or organic molecules) used in organic chemistry to change an organic substance in the desired way.

In analytical chemistry, a reagent is a compound or combination that is used to measure a substance's concentration using colorimetry or to detect the presence or absence of another substance, for example, by a change in color. Examples include the reagents from Fehling, Millon, and Tollens.

For structure please refer attached file

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Answer:

No change to the cation  Add -ide to the anion

Question 1 and .2

Explanation:

The balanced molecular equation for the reaction between sodium hydroxide (NaOH) and aluminum chloride (\(AlCl_3\)) in aqueous solution can be written as follows: 2NaOH(aq) + 3\(AlCl_3\)(aq) → 3NaCl(aq) + \(Al(OH)_3\)(s)

In this reaction, sodium hydroxide (NaOH) reacts with aluminum chloride (\(AlCl_3\)) to form sodium chloride (NaCl) and aluminum hydroxide (\(Al(OH)_3\)). The coefficients in the balanced equation indicate the stoichiometric ratio between the reactants and products.

The physical states of the substances are indicated by the symbols (aq) for aqueous solutions and (s) for the solid precipitate.

The reaction is a double-displacement reaction, also known as a precipitation reaction. Double-displacement reactions involve the exchange of ions between two compounds, resulting in the formation of a precipitate.

In this case, sodium hydroxide and aluminum chloride react to form sodium chloride and aluminum hydroxide, with aluminum hydroxide being the white solid precipitate.

It's worth noting that the actual reaction might involve hydrated forms of the compounds, such as NaOH·x\(H_2O\) and \(AlCl_3\)·y\(H_2O\). However, for simplicity, these hydrated forms are not included in the balanced equation.

Overall, the balanced equation represents the chemical reaction between sodium hydroxide and aluminum chloride, showing the reactants, products, and their stoichiometric ratios.

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Answer:

1547 mL

Explanation:

Use the following conversion factor for ounces to mL:

1 ounce = 29.5735 mL

Set up the equation like this:

\(52.30oz *\frac{29.5735 mL}{1 oz}\)

Solve:

Using a calculator we get 1546.696 mL.

There are 4 sig figs in 52.30, so the correct answer would be 1547 mL.

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Considering the given statements about the filament sliding model in muscles, the statement that is false is;

Muscle filaments or myofilaments are the three protein filaments that make up the myofibrils in muscle cells.

There are three main proteins filaments that make up the myofibrils, and they are:

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Answer:

To determine the change in mass of A over the given time period, we need to find the difference between the initial mass of A and the final mass of A.

From the given table, we can see that the initial mass of A at t = 0 (start time) is 12.4 g and the final mass of A at t = 60 minutes (end time) is 6.2 g.

Therefore, the change in mass of A over 60 minutes is:

Final mass of A - Initial mass of A

= 6.2 g - 12.4 g

= -6.2 g

The negative sign indicates that the mass of A decreased over time, which means that A underwent some kind of reaction or process that caused it to lose mass.

The change in mass of A over 60 minutes is -6.2 grams.

To determine the change in mass of A over 60 minutes, we need to compare the initial mass to the final mass.

From the given information, we can see that the mass of A decreases over time.

Let's calculate the change in mass.

Initial Mass of A: 12.4 g

Final Mass of A: 6.2 g

Change in Mass of A = Final Mass of A - Initial Mass of A

= 6.2 g - 12.4 g

= -6.2 g

The change in mass of A over 60 minutes is -6.2 grams.

Note that the negative sign indicates a decrease in mass.

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One-point perspective is a type of linear perspective where all lines converge to a single vanishing point on the horizon line. This technique is particularly suitable when depicting interior spaces or scenes viewed from a single vantage point.

For Jean to accurately depict the height of objects in the room, she should utilize a one-point perspective drawing. One-point perspective is a type of linear perspective where all lines converge to a single vanishing point on the horizon line. This technique is particularly suitable when depicting interior spaces or scenes viewed from a single vantage point.

By placing the vanishing point on the horizon line, Jean can establish a point of convergence for all vertical lines in the room. The height of objects, such as furniture, walls, or doors, can be represented accurately by drawing vertical lines from their base to the vanishing point. This approach creates a sense of depth and proportion, allowing viewers to perceive the relative heights of objects within the room.

Using one-point perspective will help Jean create a clear and realistic representation of the room's spatial arrangement, enabling her to accurately communicate the height relationships between different objects present in the crime scene.

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Answer:

II. tastes sour III. conduct electricity

Explanation:

Let us go through all three statements.

Statement I says that acid doesn't react with a metal.

This is false because acids react with metals to form salt and hydrogen.

Statement II says that acids taste sour.

This statement is true. If you taste a lemon you realize that it's sour. This is due to the presence of citric acid in the lemon.

Statement III says that acids conduct electricity.

This statement is also true. If you mix an acid in the water, it dissociates many Hydrogen ions which act as charge carriers and help conduct electricity.

Answer:

1. 2K(s) + Cl2(g) → 2KCI(s)

2. 4NH3(g) → 2N2(g) + 6H2(g)

3. 2AgNO3(aq) + CaCl2(aq) → 2AgCl(s) + Ca(NO3)2(aq)

4. CH4(g) + 2O₂(g) → CO2(g) + 2H₂0(g)

Given the data from the question, the number of aluminum atoms in aluminum oxide, Al₂O₃ is 2 (Option B)

From the formula of the compound, Al₂O₃ we see that the compound is composed of

From the above, we can conclude that Al₂O₃ contains 2 atoms of aluminum.

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Answer:

Explanation:

To find the concentration of a solution, we need to divide the number of moles of solute by the volume of the solution in liters.

In this case, we have 0.50 mol of NaCl dissolved in 0.30 L of solution. Therefore, the concentration of the solution can be calculated as:

Concentration = moles of solute / volume of solution

Concentration = 0.50 mol / 0.30 L

Concentration = 1.67 mol/L

Therefore, the concentration of the solution is 1.67 mol/L.

Answer:

Animal cells don't have a dividing cell wall like plant cells do

Explanation:

Plants cells use photosynthesis from the sun, which requires them to have chloroplast filled with chlorophyll to complete this function; animal cells do not have chloroplasts

Answer:

Explanation:

Answer:

Though a hydrogen atom has only one electron, it contains a large number of shells, so when this single electron jumps from one shell to another, a photon is emitted, and the energy difference of the shells causes different wavelengths to be released. Hence, mono-electronic hydrogen has many spectral lines.

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The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.

Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.

The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.

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Answer: metal turn orange and weaker as it gets oxidised

Explanation:

When we handle chemical substances we must be very careful because they can put our:

A chemical substance is a chemical compound resulting from the union of two or more chemical elements. Compounds have different uses depending on their properties. However, some can be harmful and life-threatening to humans.

The potential acute effects of some compounds may be related to skin contact causing:

On the other hand, the chronic effects of chemical compounds can be:

There are a large number of chemical substances and each one has different properties. Therefore, it is very difficult to generalize about a treatment in case of ingestion. What must be done is to know the level of risk of the substance that is being handled and avoid ingesting it at all costs. However, if it is ingested, go to the emergency room.

Not all chemical compounds have the same flammable response to fire. Due to the above, it is necessary to identify if the substance that we are handling is highly or slightly flammable, for this we can consult the manual of the substance or the label of its packaging.

According to some studies and the hydrochloric acid safety data sheet, it can have dangerous reactions with:

When we handle chemical substances we are facing a potential risk. Due to the above, protocols have been developed for its handling, which include the use of protection elements such as:

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Answer:

Examine these two MSDS from different manufacturers for sodium hydroxide (NaOH). Compare and contrast the following aspects: chemical names, chemical properties, order of components, health hazards, and proper disposal. Click on each of the links to examine two MSDS reports from different sources.

Explanation:

Explanation:

..i think is a habitat ...

Compared to the freezing point and boiling point of water at 1 atmosphere, a solution of salt and water at 1 atmosphere has a option b. lower freezing point and a higher boiling point.

When a solute, such as salt, is added to water, it affects the properties of the solution, including its freezing and boiling points. Adding salt to water lowers the freezing point and raises the boiling point compared to pure water at the same pressure.

Lower Freezing Point: The presence of salt disrupts the formation of ice crystals, making it more difficult for the water molecules to arrange into a solid structure. This results in a lower freezing point for the saltwater solution compared to pure water.

Higher Boiling Point: The dissolved salt particles increase the boiling point of the solution. It requires more energy to break the intermolecular forces between the water and salt molecules, resulting in a higher boiling point for the saltwater solution compared to pure water.

Therefore, option B is correct: a solution of salt and water at 1 atmosphere has a lower freezing point and a higher boiling point compared to pure water.

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The correct answer is :

Compared to the freezing point and boiling point of water at 1 atmosphere, a solution of salt and water at 1 atmosphere has a

A. lower freezing point and a lower boiling point.

B. lower freezing point and a higher boiling point.

C. higher freezing point and a lower boiling point.

D. higher freezing point and a higher boiling point.

Answer:

a base

Explanation:

The actual amount of substance each required or produced by the reaction is obtained by stoichiometry.

From the reaction equation;

2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)

Number of moles in  1.56 grams of H2(g) = 1.56 grams/2.00g/mol = 0.78 moles

If 2 moles of water yields 1 mole of H2

x moles of water yields 0.78 moles of H2

x = 2 × 0.78/1 = 1.56 moles of water

Mass of water required = 1.56 moles of water × 18 g/mol = 28 grams of water

The statement that the reaction requires 27.9 grams of H2O is true.

Also;

The number of moles in 1.55g of NaOH = 1.55g/40g/mol = 0.039 moles

If 2 moles of water produces 2 moles of NaOH

1.56 moles of water produces 1.56 × 2/2 = 1.56 moles of NaOH

Mass of NaOH = 1.56 moles of NaOH * 40 g/mol = 62.4 g of NaOH

The statement that the reaction also produces 1.55 grams of NaOH is false.

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Answer:

ethanoic acid

Explanation:

as it also contains carbon dioxide water and oxygen as glucose

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The molecule that has the same empirical formula as glucose is ethanoic acid.

Empirical formula of a compound is defined as the simplest whole number ratio of atoms which are present in a compound.It does not make any mention of the arrangement of atoms or the number of atoms. The empirical formula gives information about the ratio of number of atoms which are present in a compound.

Molecular formula is determined from the empirical formula by dividing the molar mass of a compound by the empirical formula mass. The resultant which should be a whole number or very close to the whole number , then the subscripts are multiplied by the whole number to get the molecular formula.Empirical formula is the condensation of molecular formula.

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Answer:

here, as we have known the elements of group 3A(13) such as aluminium , boron has three valance electron and in perodic table the elements are kept with similar proterties in same place so, their valance electron is 3.

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The number of valence electrons are in the electron dot structures for the elements in group 3A(13) is three.

The periodic table is organized into groups (vertical columns), periods (horizontal rows), and families (groups of elements that are similar). Elements in the same group have the same number of valence electrons.

Groups are the columns of the periodic table, and periods are the rows. There are 18 groups, and there are 7 periods plus the lanthanides and actinides.

There are two different numbering systems that are commonly used to designate groups, and you should be familiar with both.

The traditional system used in the United States involves the use of the letters A and B. The first two groups are 1A and 2A, while the last six groups are 3A through 8A. The middle groups use B in their titles.

Therefore, The number of valence electrons are in the electron dot structures for the elements in group 3A(13) is three.

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We can produce more products by;

A. Increasing the concentration of H₂ gas in the reaction vessel

B. Decreasing the temperature in the reaction vessel

C. Removing the H₂O from the reaction vessel as it forms

Water is created through an exothermic process. Heat energy is released when hydrogen gas (H2) and oxygen gas (O2) mix to make water (H2O). An exothermic reaction is characterized by this energy release.

The reaction's overall energy change is negative, which shows that energy is released. The reaction is exothermic because the extra energy is released as heat into the environment.

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Missing parts;

Water can be made using the reversible reaction shown. Which change would

keep this reaction from shifting to form more of the product?

2H₂+022H₂O + energy

A. Increasing the concentration of H₂ gas in the reaction vessel

B. Decreasing the temperature in the reaction vessel

C. Removing the H₂O from the reaction vessel as it forms

D. Increasing the temperature in the reaction vessel

Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume}\\\)

From the question we have

volume = final volume of water - initial volume of water

volume = 22.76 mL - 15.35 ml = 7.41 mL

\(density = \frac{19.060}{7.41} \\ = 2.572199\)

We have the final answer as

Hope this helps you